Heel lift attaching machine



Aug. 6, 1940. w. J. YOUNG HEEL LIFT ATTACHING MACHINE Filed July 50, 1938 4 Sheets-Sheet 1 EL J Aug. 6, 1940. w. J. YOUNG HEEL LIFT ATTACHING MACHINE Filed July 30, 1938 4 Sheets-Sheet 2 g- 6, 1940- w. J. YOUNG 2,210, 53

HEEL LIFT ATTACHING MACHINE Filed July 50, 1958 4 Sheets-Shet s W a 75 7f x w m/ 90 5/ W Au 1940. J Y UNG 2.210.053

HEEL LIFT ATTACHING MACHINE Filed July 30, 1938 '4 Sheets-$heet 4 looezaed zfl a aaw ll'l Patented Aug. 6, 1940 v a UNITED STATES PATENT OFFICE I William J. .Young, Peabody, Mass, assignor to W. J. Young Machinery Company, Lynn, Mass, a corporation of Massachusetts Application-M13 30, 193s, SerialNo. 222,175 18 Claims. (01. 1 -32) This invention relates to means for attaching and a partof the feeding means by which nails top lifts to heel bodies, and particularly for atare conducted from the magazine to the driving taching leather lifts or tread layers to wood position. This figure is a section taken on line heels. However, the materials of which the heel i4.-|4 of Fig. 1;

5 bodies and top lifts or tread pieces are made, are Fig. 151s asectional elevation of the hopper and 5 not factors or limitations of the invention. nail uiding means taken on line l5-1l'5 of The objects are to provide an effective and Fig. 14-; 1 satisfactory means forcentering the lift and heel Fig; .16 is a detail section of a portion of the body, to combine such centering means with nail feeding means taken online [6-46 of m automatic nail driving means, and to provide 'Fig. 14., 7 3 I. improvements in nail feeding, positioning and Like reference characters designate the same driving means by which enhanced speed, accuparts Wherever they occur in all the figures. racy and efficiency are obtained, and to afford The effect produced by the machine is shown means for quick and easy adjustments and subin Fig. 3, where arepresents a wood'heel body, b stitutions of parts to be made whereby to acrepresents a leather top liftor treadpiece, and c commodate heels of different styles and dimenrepresents nails which are driven through the sions and to effect the union between the heels top lift into the heel body for securing the one and top lifts by different numbers and patterns to the other. The nails here shown are unlike. of nails. conventional nails, brads or tacks, in that they r- The invention consists in machines having have neither heads. nor points, but are similar to means for accomplishing the foregoing objects, dowels in that respect. They may be made by and other characteristics set forth in the followsimply cutting off suitable lengths of wire of ing specification, not only in the specific form suitable gauge, without further operations. Bethere described, but in all equivalent mechanical ing headless theyare driven at different inclina- In the drawings furnished to illustrate the hold the attached lift securely by the divergence invention- I I Y of those portions. which pass through the lift. Fig. 1 is a front elevation of a machine em- Although differing from ordinary nails inv the bodying the invention; 7 I e respects noted, they areotherwise analogousand 5 Fig. 2 is a right hand side elevation ofthe will be referred to as nails in this specification, machine; and it will be understood that the drivingmeans Fig. 3 is a side view, partly in section, of a of the machine is adapted to drive headed nails wood heel with an attached leather top lift showas well. ing the result accomplished by the operation. of The operating parts of. the machine are the machine; mounted in'a frame I which, inthedesign here Fig. 4 is a vertical section of the upper part .illustrated,is secured to a base 2 which is adapted of the machine taken on line 4-4 of Fig. l; to rest; on the floor and has a bracket 3 attached Fig. 5 is a detailsection' taken on line 5-5 to one side of it supporting a driving motor 4. of Fig. l; 7 Such frame and motor may, howeverfbe other- Fig. 6 is a detail section taken on line 6-6 of wise supported within the scope of the invention. Fig. 5 and represented one larger scale; 1 Secured to the front of the frame are parallel 7 is a Cross s ct 0 e Of F brackets '5, 5 supporting between them a block 3 is a horizontal section on line 0f 6 which is both a support for heels to be operated Fi l and a plan of the pa ts be w ai e; on, a receiver for nails to.be driven, and a guide F 9 is a Vertical section 1111B of Fig for a number of nail drivers. Said brackets and 45 Fig. 10 is a p r l section similar to 9 blocks have complemental parallel ways 1 conshoivi g one of the movableparts Of t machine structed suitably to permit removal of the. block in a di e POsitiOIl; and substitution of other blocks in-which the 11 s detail sBCfiQIl 011 line of nail driver guideways are provided in different Fig. 9; numbers and patterns. The block is secured Figs. 1'2 .andl3 are perspective views showing immovably in placeby clamping means-of any the gauges by which the heel body and lift are suitable character known to mechanics, not centered or alined with one another preparatory shown, or necessary to be shown, here. The top to the nailing operation; surface 8 of the block isthe part which supports Fig. .14 is a sectional view of thenail magazine the heel to be operated on, as shown in Fig. 4. M

n embodiments of like means and combinations. .tions with. respectto one another in order to The lift 1) in the present illustration is of larger dimensions than the tread end of the heel body and must be properly centeredwith respect thereto so that a sufi'icient margin will be left for trimming to the prescribed final contours and outline. This is the usual condition with respect to leather top lifts applied to wood heels. For this purpose a breast gauge 9 and two pairs of side gauges or clamps I0, I B and II, I I are provided. The breast gauge is secured to the block 6 and is formed with a face adjacent to the supporting surface 8 against which the breast of the lift 1) abuts, and an overhanging lip I2 for engagement with the breast of the heel body. It is secured adjustably to the block 5 by screws I3 passing through slots I4, (see Fig. 13). With other types of heel, however, the top lift may be smaller than the heel body, and for such cases the breast gauge may be reversed and placed with the lip I2 next to the supporting surface. Or gauges with similar lips of different widths, or with no lip at all, may be substituted for one another.

The side gauges II], II! and II, II are mounted in parallel planes on pivot studs I5, I5, rising from a carrier I6 which is approximately in the same plane with the supporting surface 8. The gauges l overlap this surface and are adapted to engage the sides of the lift b, being of less thickness than the lift and located so near the supporting surface that they may pass beneath the edges of a heel body wider than the top lift; while the gauges II are supported by spacers I! in a higher plane, clear of the lift and are adapted to engage the sides of the heel body. The members of each pair of side gauges have intermeshing gear teeth I8 which cause them to turn equally and oppositely when either of such members is moved around its pivot stud, and they are drawn together by springs I9 arranged substantially as shown in Fig. 8. Adjustable stop screws 20 and 2| coact with an abutment 22 on the carrier I 6 to position the side gauges for lifts and heels of different widths, so that the flaring inner faces at the extremities of such gauges will be held apart widely enough to admit the breast end of the lift and heel body, and points on such faces within the extremities will bear on their sides. One stop screw is threaded through a lug on the upper side of one of the lower side gauges, and the other screw is similarly mounted in a lug on the under side of the relatively opposite member of the top pair of gauges, so that both screws are enabled to bear on the same abutment. The range of independent adjustment of the two pairs of gauges enables heel bodies which are wider than their top lifts, as well as those which are narrower, to be properly centered, and also accommodates a wide range of heels.

v The guides for nail drivers and pockets to receive nails to be driven are provided by sleeves 23 set into passageways formed through the block with a close driving fit and are thus se curely held frictionally. The bores in the upper parts of the sleeves are large enough only to receive and guide the nails and the drivers 24, which are of approximately the same diameter as the nails. The lower ends of the sleeves are enlarged to fit slidingly the larger and more rugged parts 24a of the drivers which protrude from the sleeves and are engaged by the impeller or pusher later described. These guides and drivers are thus made of different diameters in their different portions to prevent bending and buckling of the small nails while being forced into obdurate material such as seasoned hardwood, and to provide essential stiffness in the protruding thrust-receiving parts of the drivers.

The nail driver impeller is a bar 25 which reciprocates in a vertical guideway 26, secured to the frame I beneath the drivers, and has at its upper end a platform 25a of sufficiently large dimensions and suitably located to engage and apply pressure to the lower extremities of the drivers. Preferably, although not necessarily, the impeller carries a plate 21 on which the ends of the drivers bear. As the drivers, many of them, are inclined to the vertical, that is, to the direction in which the impeller is moved, their ends are displaced laterally in being advanced. Hardened screws or plugs 21a (Fig. 9) are set into the plate under the drivers and have smooth end faces on which the abutting ends of the drivers bear. Their function is to prevent formation of grooves in the plate due to sliding contact of the drivers, and to make adjustments in compensation for whatever wear occurs. Springs 28 surrounding the drivers and confined between the block 6 and abutment disks 29 secured to the drivers hold the latter retracted whenever permitted by the impeller. Downward movement of the latter is limited by the guide 25 against which a shoulder 25b on the impeller bears when in the lowermost position.

A lever 30 is connected at one end by a pivot 3I to the lower end of the impeller 25 and is connected at its opposite end by a pivot 32 with a link or connecting rod 33 which is coupled by a pivot 34 with an operating lever 35, here shown as having a treadle so that it may be depressed by the foot and weight of an operator. This treadle lever is pivoted at 36 to a bracket 3! on the foot of the base, and is normally ele vated by a spring 38 anchored to a pin 39 on the side of the base.

The lever 30 is connected at an intermediate point in its length by means of a pivot 48 with a rod 4| rising to a pivot connection at 42 with a lever 43 which is pivoted at 44 to a bracket 45 on the upper end of the frame I. The opposite end of lever 43 is slotted lengthwise to receive a pivot 46 which connects it with a two part adjustable rod 41a, 4717, which slides in alined guideways 48, 49 on the frame and carries a clamp 50 on its lower end. Said clamp is adapted to bear on the seating face, or upper end, of a heel body resting on the work support (block 6) and clamp the heel body thereon, at the same time resisting and counteracting the thrust applied by the drivers in setting the nails. It is pivoted to the rod at 5! so as to be self adjusting to different heels of which the seating faces extend at different inclinations.

Adjustment of the clamp to heels of different heights is effected by changing the over all length of the two part clamp rod. For this purpose one of the parts as 41b has a threaded extension 410 which is screwed into a threaded socket 41d in the other part or member. A look nut 52 is threaded on the extension 410 to secure the adjustments effected by turning one member relatively to the other.

The springs 28 and 38 normally hold the drivers retracted and. the treadle and heel clamp raised, in the positions shown in the drawings. When the treadle is depressed, the lever 30 first turns about its pivot connection 3| as a fulcrum, lowering, or permitting to be lowered, the linkage carrying the clamp 50, until the latter is stopped by the heel. Thereafter continued decausing the nail drivers .nails driven intothe heel.

pression' of thetreadle turns 1ever30about the pivot was a fulcrum, and raises th'eimpeller25 to'be advanced and the Owing to them'ann'er in which the lever 30 is coupled" to both the impeller and the heel clamp, the same'continuirig motion of the lever advances both,successively in relatively opposite directions, and the forceap-L plication of the lever causes the pressure exerted on the heel. by the clamp to be proportional to the effort required to drive thenails.

Aftereach nailing operation, the gauges are withdrawn, the heel last operatedon'is removed, the drivers are retracted, and the nail'receiving spaces or chambers in again charged with nails by means which-I will now describe.

A nail magazine or hopper 53 of cup-likeforrn rotates about a horizontal axison a'studshaft 54 secured to an upright 55 (Fig. 2) on a platform 56 having a bracket 51 secured to the side of the frame. A stationary cover plate 58 is mounted on the platform across magazine and has an inlet 59 in its upper part. The walls of the rotating part of the magazine are provided with lifter'vanes or buckets 60 ar? ranged and formed to carry nails upwardfrom the mass in the bottom and discharge them from points at and near the topside of thejniaga zine. An inclined table BI is supported from the stationary cover plate by arms 62' in the space surrounded by the lifters Bill It is inclined downwardly toward the cover wall, steeply enough so that any nalls which fall upon it will roll or slide off, no matter how they are positioned when striking the table. The upper sure faceof the table contains spaced parallel gr oves 63'extending along the slope of the table to re ceive and guide those nails which happen tofall into them. A deflector 64 is secured to the cover wall 58 above and forward of the table at an opposite inclination thereto, so as to deflect and guide upon the table those nails which'happen to drop from the lifters too far forward to ,be supported and guided by thetable. tubes are mounted in the lower part of the front ,wall 58, each in the same vertical plane, and in approximate alinement, with one of the guide grooves 63 of the table. These tubes ex!- tend through. the front wall and are. alined. with extension tubes 66. 'Terminal tubes 61- are mounted in a. forward extension of the hopper supporting platform 56, being secured detach.- .ably therein by set screws 68. A nail feeder or escape device 68 is mounted across the. outlet ends of all the terminal tubes 61. It is .a cylindrical bar mounted rotatably with itsaxis horizontal. and transverse to the terminal tubes, so as to. block the outlets therefrom, and it has transverse passages H3 adapted to behbrought, by partial rotation of the feeder, intoalinement with the terminal tubes. 1 I

The tubes 65, 66 and 81 of each grouparein alinement with one another, or nearly enough in alinement, and mounted at a sufficiently steep inclination, to conduct nails by gravity from the receiving table 6| tothe. feeder 69. More than enough nails to keep the tube groups full at all times fall into the locatinggrooves 53of the rea ceiving table and enter the several receiving tubes. tube groups as the largest number of nails ever required to be used for the purposes of the 'ma chine. In order to adaptthev machine to use less than this maximum number, one Oramor'e the supporting block are the open end of the charge them into the latter.

Conductor There are as many alining' gr'oovesand tion 66, in alinement/withthe'terminal section 61, as shown1inFig. 14, and notches II are formed in the stationary hopper wall, 58 to receive-the upper end and locate it in alinement with the receiving tube 65. But it is to be understood that a single continuous tubemay be used instead of any one or more of the sectional tube groupsfor conducting one or more nails. r

Conductor tubes I2 lead to a transferer or loader 13 (Figs. 9 and 10), which transfers nails tothe supporting block 6, as will be presently described. The upper ends of these conductor tubes are fixed in a row parallel to the feeder cylinder, each in the same vertical plane with one of the tube sections 61, but at an angle to such section. The vertex of this angle is inzthe axis of the feeder 68, hence by partial rotation of'the feeder its passageways 10 may be brought into alinement with the tubes 61 and 12 alternately to receive nails from the former and dis- I Lugs T4 and'l5 on the feeder coact with a fixed stop 16 to limit the angular movements of the feeder to the positions in which the above described alinements occur. A fixedshield '1'! adjacent to the feeder prevents the nails from passing out of the passageways 10 when the latter are in alinementwith the tubes 6! and until they come into register with the tubes 12.

' Theconductor tubes are flexible so that their lower ends may be shifted to deliver nails in accordance with different prescribed patterns 'or arrangements of nails in the heel. In a heel with supporting block. Different 'transferers are interchangeable withone another, as will be presently described. Consequently the lower ends of the conductor tubes are shiftable to accommodate such different patterns. Their lower ends are received and frictionally held in socket tubes 19 which are secured to, and rise from,

a pattern plate 80 above the loader 13.

The magazine is mounted at a suihcient height to permit gravity feed of nails to the pattern plate, and to enable the lower ends of the conductor tubes to be more or less displaced without obstructing such" feed. And the hopper is continuously rotated at a speed which insures fall of correctly located nails on the table .6! in excess of the needs of the machine and maintains at all times a reserve supply of nails in the alined tubes 55, 655, 67. The motor 4 thus rotates the 82, pinion B3'on the shaft of pulley 82, an intermeshing gear 84 on a parallel shaft 85 (Fig. 6'), a pulley '86 on the shaft 85, and a belt Bl surrounding the latter pulley and the hopper.

The nail loader or transferer 13 previously hopper by means of abelt 8|, pulley 8 and 9) on a slide or carriage 90 which reciprocates in a horizontal guideway 9I attached to one side of the main supporting frame. The traverse of the loader is from the position shown in Figs. 8 and 9, directly beneath the pattern plate 80, tothe position shown in Fig. directly over the supporting block 6. In one position the passages I8 of the transferer are in register with corresponding passages 92 of the pattern plate, and in the other its passages register with corresponding driver guideways 23 in the supporting block. A bottom plate 93, which also has holes 94 in the same pattern as the passages I8, is provided to obstruct these latter passages when receiving nails from the pattern plate. The bottom plate is slidable in a dovetail guideway in the loader (see Fig. 11), and has a 'lug 95, against which a spring projected plunger 96 of the carriage 90 acts to hold the bottom plate normally with its openings 94 out of register with the passages I8. This lug is arranged to abut against a shoulder 91 on the supporting block as the loader advances, when the holes 94 are alined with the driver guides. A shoulder 98 is suitably located on the carriage to strike the lug 95 and arrest the carriage when the passages 18 of the loader thereafter register with the holes 94; and an adjustable stop screw 99 is "mounted in a cross bar 99a on the outer end of the carriage guideway to arrest the carriage when, in its outward movement, the passages 18 register with those in the pattern plate.

The pattern plate 80 is detachably mounted in a frame I00 on top of the guideway 9,I and is secured by a set screw IOI, whereby different pattern plates may be readily substituted. for one another.

Automatic mechanisms, controlled by the treadle, operate the nail feeder and loader, and displace the heel side gauges from the path of the loader. These mechanisms comprise the following parts.

A shaft I02 (Fig. 6) alined with shaft 85 and independently rotatable, carries a drum I03 and a crank disk I04 which are made fast to the shaft by set screws, (as are also the gear 84 and pulley 86 made fast to the shaft 85). These alined shafts rotate in bearings on standards I05 and I06 supported by a bracket ID! on the side of the frame I (Figs. 1 and 2). The drum I03 is surrounded by a brake band I08, the ends of which are penetrated by a rod I09 (Fig. '7) and are drawn together by a spring I I0 acting against one of such ends and reacting against an adjustable abutment nut I I I screwed upon one end of the rod. A pin II2 projecting from one side of the gear 84 engages the opposite end of rod I09 and through the latter applies torque to the brake band. The band exerts friction sufficient to rotate the drum I 03 when the latter is unobstructed. but is enabled to slip when the drum is positively prevented from rotating. The drum is thus prevented by a latch II3 (Figs. 1 and 5-) which is normally held by a spring I I4 in the path of a projection II 5 on the circumference of disk I 04. A crank pin II 6 on said disk is coupled by a link II! with an arm I I8 on a rock shaft I I9 to which a second arm I is secured. Arm. I20 is pivoted to a block I2I (Fig. 9) slidably mounted on a connecting rod I22 which is attached by a pivot pin I23 to the slide or carriage 90. Springs I24 and I25 surrounding the connecting rod at opposite sides of the block I2I, and confined between abutments I26 and I21 on the rod, trans- Init the movements of arm I20 in opposite direc- .tions to carriage 90 and yield to permit stoppage of the carriage at points short of the full throw of the arm. When the crank disk makes a complete rotation counter-clockwise with respect to Figs. 1 and 5, it swings the arm I20 first to the left and then to the right. a In its leftward travel the arm moves more than far enough to bring loader I3 into delivering register with the supporting block 6. When the loader reaches the position of register, it is arrested by the coming together of the lug 95 and shoulders 91 and 98; and spring I24 thereafter yields to permit further movement of arm I20. The yieldable connection between the carriage and its driver permits a long enough pause before reversal of the carriage to ensure that the nails will drop out of the loader; and enables the stopping location of the carriage to be accurately established by the lug and shoulders, avoiding necessity of constructing the power linkage with such extreme accuracy as would otherwise be necessary to ensure exact register of the small passages in the loader with those in the driver block. I

The rock shaft II 9 carries also a cam I28 (Figs. 1 and 5) which cooperates with an arm I29 ona rock shaft I30 transverse to I29, extending into the interior of the frame I and carrying anupright I 3| on its inner end; (see also Fig. 4). A spring I32 connects arm I3I with an anchorage on a fixed part of the frame, normally holding this arm in the position shown and causing the arm I29 to bear on the upper side of cam I28. Arm I3! is connected by a pin and slot connection I33 with the carriage I6 on which the heel gauges I 0 and I I are mounted. The cam I28, turning counter-clockwise from the position shown in Fig. 5 while arm I29 swings to the left, raises arm I29 and, through the connections with the gauge carrier I6 above de scribed withdraws the gauges from the path of the loader. It also holds them out of the way while the loader is advanced over the block 6 and retracted clear of the block.

Carriage 90 controls or operates the feeder 69. One of the trunnions or. pivots of the feeder carries on its outer end an arm I34 (Figs. 2 and 16) connected by a helical tension spring I35 with an arm I36 (Figs. 1 and 8) on a rock shaft I31 which turns in a bearing I38 on the guide 9| and extends over the carriage 90. An arm I39 is secured to shaft I3! in the path of a block I40 on the carriage, and these parts are so located that when the carriage is retracted in the position which registers the loader with the pattern plate, the feeder is held in the position shown in Fig. 14, where its passageways l0 register with the conductor tubes 12. A spring I4I (Fig. 16) is coiled around the pivot extension of the feeder and reacts between a pin on the stationary frame and the arm respectively in a manner to turn the feeder into register with the tube sections 61, when arm I39 is unrestrained. Spring I35 is much stronger than spring I4I, whereby it overcomes the resistance of the latter when pulled upon by the arm I36 under the action of the loader carriage, and yields only when the stop lug I4 is arrested by the pin 16. It is encased and protected by a shield I42 secured to the side of guideway 9|.

The operating lever 35 controls the nail feeding mechanism by means of a lever I43 (Fig. 4) pivoted at I44 to a bracket on the frame and having on the end of one arm a pin I45 which overlies that arm of the main lever 30 which is con- I with the lever I30.

nected .to the link-33. .The otherarm lever I43 isluconnected by a pin .and slotv connection I46 with .any upright bar or rodl I4I fitted slidingly in-astationary guideway: I48 andconnectedfto a spring 149 which is anchoredlby means of a pin -I50:.-to .the frame. .This spring tends constantly to raisetherod I41 and; holds-thepin I45, or. an antifriction roll mounted on said-pin, incontact Hence, whenever the treadle is depressed, the rod I4! is raised; and itislowered when the treadle is raised. Spring, 38 which raises the treadle is enough stronger than spring I49 to overcome the latter without yielding to any considerable or objectionable extent. a ,The rod I41 carries a pawl I5Inormally held. by a spring. I52 againsta stop pin I53 sothatits extremity or toe underlies the extremity of a horizontally extending. arm,I-54 which is apart of, or

connected with, the latch I,I 3.1 Conveniently the latch and arm are made as two arms oi-a bell crank lever pivoted on a stud I55. Pawl .I5l yields when, in rising, itencounters arm I5 3; but depresses this arm when descending, and so withdraws the latch fromarrestingposition with respect. to the projection II5 of the crank disk. ,Thepawl quickly passes and releases arm 154 in its descent, whereupon spring II I restores. the latch to its normal position in the path of the projection on the crank disk, ready to arrest the latter on completion of one rotation.

- In the normal position, the position of rest, of the machine, the parts thereof occupy the locations shown in all of the figures of the drawings except.

Fig. 10. In ordertoattach a tread piece I) to a heel .body a, the operator places the tread piece onthe support 6 against the breastgauge 9. and

' between theside gauges I0, I0, places a heelbody ontop of the tread piece against the breast gauge I and between the side gauges I I, I I, anddepresses the treadle 35 withforce .enough to drive anumber of nails simultaneously into the .heel. The.

first part of the movement brings the clamp .50 down on'the heel body,-. and the; balance of .the

treadle movement in the same direction-drives .the

nails.

Upon scends and'trips the latch II3. Thereupon the motor driven mechanism advances the'loa'der 13 carrying a charge ofnails over .thesupporting block,-wi thdraws the side clamps from,the*path of the loader, and then returns the loader 'and side clamps .to their previous positions. At the same, time it permits the feeder:6 9.' to be turned by. its spring I4I into position to receive'nails from the delivery. tubes. }--The loader pauses over the supporting block shortly before, while and shortly after the crank pin -II6 passes thetdead'point.

which ail'ordsample time for the charge ofxnails to be deposite'djn the block. It then returns to starting position and as it reaches that position turns the. feeder 69 so thata new charge of nails is delivered tothe loader. The crank-disk is then arrested and the mechanisms driven by it remain at rest until another heel is nailed. It will be apparentuthat the machine is substantially automatic, requiring care and effort on the part, of the operator onlyto place the-thread lifts and heel bodies betweenthe gauges and to step on thetreadle. 'Ihel'everage of the treadle is so great and the driving distance so shortthat moderate forceapplication suffices todrive the nails-into heels made of the hardest woods. The gauges correctly centralize the heel body with respect to thetread piece :and avoid danger of a y;.-a. cid n l misalignment: Thesasa s we release of theftreadle, the barlfl dequickly. adjustable for both tread pieces'and heel bodies of ;difierent dimensions independently of one. another.

'ageways, an impeller for the drivers, a clamp mounted-in oppo'sitionto the heel support, an

operating lever, connections between said lever and impeller, and other connections between said leverand clamp, each of said connections being arranged as a-iulcrum for the other, whereby the force exertion of the lever simultaneously applies holding force by the clamp and driving force to .6

the drivers with each force in opposition to the other.

. 2. A nailing machine comprising a support having a guideway for a nail and a nail driver, an impeller movable to cause propulsion of nails from said guideway, a work clamp movable toward and away from the work support in approximate alinement with the nail guideway, a lever having a pivotal connection with said impeller, a link having a pivotal connection with said lever at a distance from thefirst named pivotal connection,

and coupling means between said link and clamp,

the leverhaving a force applying arm extending laterally from one of said pivotal connections at the oppositeside thereof from the other pivotal connection.

The machine is adjustable readily for placing nails in differentnumbers and ar-' iii! .3; A nailing machine having a work support, a

clamp movable toward andawa y from said work support for holding. work pieces thereon, a nail driver operable in said work support for forcing a nail into an article clamped on said support, and a single operating lever inforce applying and fulcrum relation to both said clamp and driver for causing work- -clam ping and nail driving actions in relatively opposite directions by movement of the lever in one direction.

4. A nailing. machine comprising a work support, a clamp movable toward andaway from.

saidsupport for holding. work pieces thereon, an impeller movable insubstantial alinement with said clamp in a location and manner to cause driving of. anailfrom said support into a work piece .thereon, an operating lever having separated fulcrum connections with both said clamp and said impeller and having an operating arm 1 atone side of. said fulcrum connections, one of said; connections including means, for causing .movement of the clamp oppositely .to movement of qthe impeller when the lever is operatively moved in one direction. e I v I i 5. A nailing machinecomprising a work support. having, driver guidewaysnail drivers mov-t able insaid guideways and protruding below said support, an impeller movable inthe general .di-

rection of. the driver movement' for, actuating the drivers to set nails in objects mounted on the work support, a clamp carrier movable toward and away from the work support above the posi-. tion of the work pieces thereon, a clamp connected tqsaidwork carrier, a lever pivoted above tlie work support conneote'drto the carrier, ale'ver connected to the impeller, and a link pivotally connected with both levers, the second named lever having anoperating arm so arrangedthat its movement in one directioncauses the clamp means react against one. another. a 10 6.-In a machine for attachingtreadslifts to heel bodies, a work support, a. pair of tread lift gauges overlying said work support adaptedto engage the sides of a tread lift placed thereon, a pair of side gauges for heel bodies mounted above the tread lift gauges at a height therefrom sufiicient to clear the'tread lift, the gauges of each pair being pivotally mounted, spring impelled toward one another, and geared together-for movement in unison in relatively opposite directions, an abutment rising between the gauges of both pairs, and an adjustable-stopscrew car ried by one member of each pair. of 'gauges, both stop screws beingarranged to bear on the same abutment.

'7. In a machine for attaching tread lifts' to heel bodies, a work support, a pair of tr'ead lift gauges overlying said work support adaptd'to engage the sides of a tread lift placed thereon, a pair of side gauges for heel bodies mounted above the tread lift gauges at a height therefrom sufficient to clear the tread lift, the gauges of each pair being pivotally mounted, spring impelled toward one another, and'geared together for movement in unison in relatively opposite directions, an abutment rising between the gauges of. both pairs, an adjustable stop screw in threaded connection with one member of the lower pair of gauges at the upper side thereof in position to bear against one side of said abutinent, and a stop screw inthreaded connection with the relatively opposite member of -the'u'pper pair of gauges at the under side thereof in position to engage the opposite side of. the abutment from the first named stop screw.

8. A nailing machine comprising a work sup-- port having channels for receiving nails, driving means for ejecting nailsfrom said channelsfa loader movable back and forth between a receiving position and a loading position over the work support, a nailfhopper; means for conducting nails from the hopper to the receiving position of. the loader, an escape device interposed in said conducting means, means for moving the loader back and forth, means for actuating the escape device to feed nails when the loader is in receiving position, and means controlled by the nail driving action for causing the loader to advance into loading position and return to receiving position when the nail driving means are retracted after setting nails.

9. A nail driving machine comprising a work support having nail receiving channels, drivers for displacing nails therefrom into work pieces on the work support, a back and forth moving actuator for the nail drivers, nail feeding and loading means operable to carry nails to the work support and charge the nail receptacles therein, normally inactive operating mechanism for causing the nail feeding and loading means to'perform their functions, and means controlled by the driver actuator for setting the operating means into action on the return travel of said actuator. V

10. A machine for attaching tread lifts to heel bodies comprising a support having a surface against which laftreadv liftiand superposed heelbody may rest andnail receiving and driver guid ing passages'opening through suchg-surfacepa loader movable over and aside from said work support having nailcarrying. passages arranged to be brought in register with said nail guiding passages when the loader-is placed over the'jsup port, gauges disposed over said support for cen-. tering heel bodies and lifts with respect to said guiding passages, and means for moving said gauges out of the way ofsaid loader when the loader is brought over the' sup'port.

11. In a machine ofthe character set forth, the combination with awork support having a supporting surface and passages opening through said surface for reception of Y nails andfor guidance of nail drivers, of gauges disposed adjacent to said supporting surface for centering a heel body and tread lift relatively to said passages, and means for moving said gauges away from said supporting surface to permit placement of. nails in said passages. 1

12. The combination in a machine of the character described, of a support having nail guiding passages opening through its supporting surface, heel centering gauges mounted adjacent to said support in position for locating a heel in a predetermined relation to saidpassages, said gauges being movable aside from the support, a loader also movable across and aside from the support having means forcarrying nails to the said passages, and correlated operating mechanism constructed and operating to move said gauges and loader each out of the way of the other when either is broughtacross the support.

13. In a machine of the character described, a supporting member having a supporting surface and nail guiding passages opening through such surface, a gauge carrier, gauges supported by said carrier over said supporting surface arranged to center heels in agiven relationship to said passages, the gauge carrier being movable in a path which displaces the gauges from their heel engaging position, and a loader guided to move over and away from the support in a path intersecting the path of the gauges and having means for carrying nails tosaid nail passages;

14. The machine combination set forth in claim 13 and comprising further correlated mechanism for movingsaid gauges and "nail-loader so'"that the gauges are displaced clear of the loader when the loader advances tonail delivering" position with respect to the work support, and vice versa.

' 15. In a machine of the character set forth, a work support having a nail guiding passage opening through the supporting's'urface thereof, a driver guided to move through-said passage, a clamp movable toward and away from the support in a path and location enabling it to clamp work pieces on the supp rt; aconimon operating lever for said driver and clamp having pivots at separated points connected for applying force to said driver and clampf respectively, and power applying means engaged with said lever at a third point at one side of the before named pivots.

16. A nailing machinecomprising a work support, a clamp movable toward and away from said supportfor holding work pieces thereon, a nail driver movable in substantial ali'neinent with said clamp at the opposite side of the worksupporting location fromthe clamp, two levers, one of which has a pivotal pressure applying engage ment withthe' clamp-"and the: other 'a similar engagement with thenail driver, a fixed fulcrum for one of said levers, a power applying means pivoted to the, other of said levers, and a link connected to both levers.

17. In a nailing machine, the combination of a work support having a nail guiding passage, a nail loader having a passage through which nails can pass, movable from a receiving position at one side of the work support to a delivering position wherein its passage is registered with the passage in the work support, positive stops for arreting said loader in each position, and means for moving the loader back and forth comprising a link connected to the loader, an arm movable back and forth in the general direction of movement of the loader, having a sliding engagement with said link, andsprings in reacting engagement with the link on opposite sidesof the arm; said springs being adapted totransmit movement of the arm to the loader and to yield when the loader is arrested by said stops.

18. In a nailing machine, a nail loader movable between a position in which it receives nails and a position for delivering nails, positive means for arresting the nail loader in each of said positions, a back and forth movable driving element for the nail loader, and means for transmitting movement from said element to the loader comprising springs at opposite sides of said element in thrust transmitting connection with the loader.

WILLIAM J. YOUNG. 

